- #Icom ic 756 pro ii panadapter pdf#
- #Icom ic 756 pro ii panadapter manual#
- #Icom ic 756 pro ii panadapter mods#
- #Icom ic 756 pro ii panadapter software#
- #Icom ic 756 pro ii panadapter free#
The longer one (TX/+12V) should be fixed, e.g. This connector (J711) is PCB mounted on RF-A unit it’s a TMP-J01X-V6 (Figure 2 and Figure 3).
#Icom ic 756 pro ii panadapter manual#
For TX/+12V and RX/RF use some short and isolated wires. On the IC-756 pro II Service Manual appears that this connector is provided to be used for connection to a Spectrum Analyzer for transceiver calibration and alignment purpose. Both ground connections can be re-used from the SO-239 solder point.
#Icom ic 756 pro ii panadapter free#
The relais (use one w/o free wheeling diode) must be mounted on the top side because there’s not enough room underneath (metal sheet cover of the tuner). Also, be very cautious with the three printed flex cables. This is caused by a loop-back from the antenna relais (TX/RX decoupling) via the RF board, passing the persistently switched input attenuator (2 relais) and the RX/TX isolator diode D131. For removing the CONTROL UNIT one has to de-solder both SO-239 connectors from the PCB. Icom IC-756 PRO (IC 756 PRO IC756PRO) 6M oscillation problem: Some IC-756PRO (-2) tend to oscillate on 6m. Remove the top lid, detach the speaker cable and remove a second internal shielding lid.
The best place for this patch-relais is directly on the CONTROL UNIT. For here a tiny reed-relais can add up several tens of dB decoupling. adding a short circuit for the ports in off-conditions. But there’s also a fourth method iv) that is both most effective and simple:Īs known from VHF/UHF antenna relais technique one can achieve huge decoupling values when earthing unused pins, i.e. Their cure effect, and worse their side effects too, are hard to estimate. A third method iii) is to increase the input damping of the final amp (there’s already a 3R-pi input attenuator). Two alternatives curing this ICOM implied design flaw are i) replacing the antenna relais and ii) replacing the decoupling diode by a better one. Even the antenna tuner changes the phase relation and can cause several go/no-go situations. When one of the attenuators is on (for sure not the default for 6m!) the decoupling might be ok. Depending on part tolerances the IC-756 oscillates on 6m or does not. On 6m the decoupling of both the antenna relais and the decoupling diode D131 is no more sufficient. Hereafter the RX path joins the TX small signal route via IC151 to the final amp. Some IC-756PRO (-2) tend to oscillate on 6m. Icom IC-756 PRO (IC 756 PRO IC756PRO) technical specifications Icom IC-756 PRO (IC 756 PRO IC756PRO) technical specifications : Icom IC-756 PRO (IC 756 PRO IC756PRO) Expand tx-freqeuncy
Icom IC-756 PRO (IC 756 PRO IC756PRO) CW Filter Shape Selection Icom IC-756 PRO (IC 756 PRO IC756PRO) Eliminate an adjacent channel noise problem (QST mod)
Icom IC-756 PRO (IC 756 PRO IC756PRO) 6M oscillation problem
#Icom ic 756 pro ii panadapter mods#
Mods for Icom IC-756 PRO (IC 756 PRO IC756PRO) : Schematics for Icom IC-756 PRO (IC 756 PRO IC756PRO) : The NB on it makes people sound like they are on a motorboat. My IC-718 DSP distorts things so much that I just leave it off all of the time, unless I can just run a bare minimum noise limiter.
#Icom ic 756 pro ii panadapter pdf#
PDF Adjusments Procedures Manual with schematics for Icom IC-756 PRO (IC 756 PRO IC756PRO) : I also like the noise cutting abilities of the IC-756 Pro II, and it doesnt sound as 'phased' as some I have listened to. PDF User Manual for Icom IC-756 PRO (IC 756 PRO IC756PRO) : Icom IC-756 PRO Instruction Manual
#Icom ic 756 pro ii panadapter software#
Programming software for Icom IC-756 PRO (IC 756 PRO IC756PRO) : Secure gently two screws on the motor clutch.Programming interface schematics for Icom:
NOTE - good idea is to add small drop of machine oil, or silicon grease, but just "small" drop.Īfter reassembly the cover don't forget to check if brake nozzle fit in right direction as marked before.Īttach the motor to ATU chassis, put again attention that brake nozzle should is positioned as on the picture, with variable capacitor at his max capacitance (closed). Last thing we need is to secure upper cover of the motor - screwdriver with small 100g hammer or electric pliers will do the job. Otherwise You'll have to open the cover again, or pray not to destroy the motor turning it by hand later. Assure that it's almost same as on my pics. NOTE: Before securing the cover, check orientation of the main output shaft with metal nozzle. Now all we need is to restore the motor to it's factory state starting with repaired rotor, and cooperating wheels in reverse order. Let the epoxy solidify, and after few hours ( or minutes ) carefully examine the surface of the magnet, bottom and upper ring, remove any glue marks or dirt with sharp knife.
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